I haven't seen any of the art or trailers, so I don't know the reference. But it looks to me like her left shoulder is rather high, unless her dress has puffy sleeves, in which case the puff should be more obvious. Love the lighting effects but it looks like the light is yellower on her dress (because of the green highlights) than on her face and white clothes. The hair behind her, to the left of the picture, should probably also be darker, since the light is strong. Having a little bit of trouble pinpointing what direction it's in from the highlights on her chest and face. But lighting tends to be a little bit of a tic for me; figuring out where it's from is a puzzle I automatically try to solve with every piece of art I look at. (It's one reason why the collage art from Silver Star Harmony with Alex holding the sword horizontally bugs me.)

While typing this, the window is scrolled so that the top of her head is offscreen. For some reason her face is reminding me a lot of Princess Leia.

Anyway, I figure you're probably secure enough in your skills that I don't also need to praise you, but for the record I do like the coloring of the dress.